Jenny Simpson has 2016 Olympic bronze and 2017 World silver, but it’s been three years since she won a Diamond League race. Opportunity knocks in a familiar place on Sunday, live on NBCSN and NBC Sports Gold.

Simpson headlines a 1500m field in Stockholm that includes Olympic teammate Brenda Martinez and Brit Laura Muir.

Men’s Long Jump — 9:20 a.m. ETOlympic champion versus world champion. South African Luvo Manyonga has won all five head-to-heads with American Jeff Henderson since Henderson edged him by one centimeter for gold in Rio, according to Tilastopaja.org. In fact, Manyonga has lost just once since Rio, indoors or outdoors, and has the two farthest jumps in the world this year. Henderson ranks No. 3 in the world this year, recording his best leap since 2015.

Men’s 400m Hurdles — 10:03 a.m. ETThe revelation in track and field so far this outdoor season has been Qatar’s Abderrahman Samba. The 22-year-old debuted in the 400m hurdles last year and is now ranked 14th all-time in the event, having clocked the fastest time in the world since 2010 (and backing it up with the next-two fastest times for the year). Here, Samba and world champion Karsten Warholm of Norway go head-to-head for the third time in 11 days. Samba relegated Warholm to second place in the previous races.

Men’s Discus — 10:35 a.m. ETDeepest field of the meet? The top four finishers from 2017 Worlds and the top five men in the world this year. Lithuanian Andrius Gudzius, the world champion, has four of the top five throws of 2018. But Jamaican Fedrick Dacres beat him at the Rome Diamond League meet. Such is the state of Jamaican athletics that the nation has two of the top six discus throwers in the world this year versus one of the top 20 sprinters in the 100m and 200m combined.

Men’s 200m — 11:40 a.m. ETThe 200m was once dominated by the U.S. and Jamaica, which combined to win every Olympic medal in the event between 2004 and 2012 and 19 of the 24 world championships medals between 2001 and 2015. Times have changed. Eight men from eight different countries across four continents have broken 20 seconds so far this year. Three of them meet here, headlined by surprise world champion Ramil Guliyev of Turkey and Steven Gardiner of the Bahamas, both chasing the world lead of 19.69 seconds shared by South African Clarence Munyai and American Noah Lyles.

Women’s 1500m — 11:51 a.m. ETSimpson not only eyes her first Diamond League win in three years, but also her first track victory over a field including Muir since 2015. The 25-year-old Brit has emerged the last few seasons as a force in one of the sport’s deepest events. Muir was fourth at the 2017 Worlds, second at 2018 World Indoors (Simpson wasn’t in the field) and passed Simpson in the final strides for second behind Houlihan at the Pre Classic two weeks ago. Muir has been faster than Simpson in five of their last six meetings on the track.

Christian Coleman, bothered by a right leg injury, eased up before finishing fourth in a 100m in Rome on Thursday. Countryman Ronnie Baker beat Coleman for the second time in a week.

Baker, a 24-year-old who has not made an Olympic or world outdoor championships team, clocked a personal-best 9.93 seconds into a slight headwind, the fastest wind-legal time in the world since August.

Coleman, who finished between Justin Gatlin and Usain Bolt at the 2017 Worlds and ran faster than the indoor 60m world record three times in the winter, crossed in 10.06. It’s the first time Coleman has finished outside the top two of an individual race since he was sixth at the Olympic trials, making the Rio roster in the relay only.

Bolt retired after worlds. The 36-year-old Gatlin was not in the Rome field.

Baker also beat Coleman at the Prefontaine Classic on Saturday, running 9.78 with too much of a tailwind for record purposes. Coleman was second at Pre in 9.84.

In other events Thursday, world champion Emma Coburn fell coming out of the last water jump of the 3000m steeplechase. She dropped behind the lead pack and ended up fourth. Olympic silver medalist Hyvin Kiyeng led a Kenyan sweep in 9:04.96, with Coburn crossing in 9:08.13.

“I am still satisfied,” Coburn said, according to the IAAF, after her first outdoor race in eight months. “I fell and then there were a lot of bodies and a lot of chaos. I do not think that I can learn from this fall. I have done this a million times. It was just a bad luck day.”

Samba, seventh in his world champs debut last year, already had the fastest time in the world for the year at 47.57 on May 4, which was also the fastest time ever that early in a year. In Rome, he beat both world champion Karsten Warholm (second place, 47.82, Norwegian record) and Olympic champion Kerron Clement (49.48, sixth place).

Jamaican Fredrick Dacres beat a discus field that included the top seven finishers from the 2017 World Championships. Dacres, fourth at worlds, threw 68.51 meters. He owns the best throw in the world this year of 69.83.

U.S. Olympian Vashti Cunningham finished sixth in the high jump. Russian Maria Lasitskene won with a 1.97-meter clearance, her 40th straight victory dating to 2016, according to Tilastopaja.org